Office



`ABBAHAM i JACKSON,

OF NEW `YORK, N.` Y.

HORSE-POWER HOISTING MACI-IIERY.

specification of Lettersratent No. 11,457, dated Aug-ust 1.,. 1854.` t

" T all whom t may concern:

Be it known that I, ABRAHAM JAoKsoN, of the city, county, and State of New York, have invented `a new and useful Improve` ment in Portable Horse-Power Hoisting- Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being made to the anneXeddrawing, making a part of this specification, which is a view in isometrical perspective of my invention, and similar letters refer to similar parts throughout. y

My invention is for improvements in portable horse power hoisting machines.

The machine consists of a framing sufficiently large to contain within it an inclined revolving horse track the shaft of which stands vertical and by its revolutions puts inmotion a train of wheel work supported upon the said frame, by which the hoisting and lowering of the weight is effected.

The principal use it is designed to make of this improvement is a substitute for the,

horse or man power as now employed in lading and unlading vessels, warehouses, &c. As horses are now used for this lpurpose they are made to hoist by direct pull upon the rope, traveling back and forth on the wharf in a .straight track; the inconvenience and waste of power attending this plan is very considerable, the horse being backed up, stopped, and started in a continuous series. In my machine the horse is kept traveling continually in one direction; the hoisting, lowering, and hauling in, being accomplished vby means of reversi ble gear so that the shafts are rotated in contrary directions at the will of the operator.

At (a) is shown the inclined circular track within the frame for the horse to travel upon. At the top of the vertical shaft is a bevel driving wheel (b) which gives motion to the main or hoisting drum by gearing into a pair of bevel wheels placed and turning freely upon a horizontal shaft (c). These wheels by working upon opposite sides of (b) have contrary motions as seen at (rl, 0). A shifting clutch placed at (f) and -turning with the shaft (0) serves to engage either wheel with said shaft or disconnect them as the case may be. These motions are performed by a lever and 5 set of stops shown at (g).

i "At (0') is the main :hoisting drum turn-` ing `with the shaft (0) andaround which the hoist rope (cZ) iswound. Above the main shaft (0) there is a second shaft (It) having also a drum (i) at one end on which` to` wind a second rope, the` use of which is to haul in the `weight at the time of lowering so as toswing it clear of the ship and land iton-the dock, or on the other hand keep it clear ofthe ships side if the weight certain parts of the operation. i These are effected by the arrangement of the gearing and t clutch shown at the opposite end of the shaft (71,). y i

At is a wheel playing loosely upon (it) and driven by a pinion (j) on the main shaft and turning once to two turns of (j) and the shaft (it) is made to revolve at that rate as compared with the shaft (0) when the clutch (L) is engaged within (j). At (70) there is another wheel similar to (j) which is to receive motion also from the shaft (0) but in a contrary direction to and also is to run still slower. This is accomplished by the wheel (70') gearing into a pinion (Z) upon the main shaft, said wheel (10') carrying a'second pinion (m) which drives the wheel At (n, n are friction wheels and straps operate upon by a brake at (o).

The operation is as follows: The horse on the revolving track (a) is started, a weight Y is to be raised, say a `measure of coals to be discharged from the hold of a i ship. As the drum (0') takes up the weight the rope to haul in is being unwound from the drum and the rate at which it is unwound must be the same as that in which the weight ascends. As the clutches (f) and (L) are no-w set, the rate of speed of (0) is twice as fast as that of The reason for this is because the hoist rope is roved through a blockv on the measure Y and therefore twice as much rope must be taken up by (0") than is let off by (i). As soon as the weight has been raised sufficiently to clear the vessel the clutch (.f) is shifted from (d) to (e), the brake (o) being applied during the transition, but the horse traveling on as before. nThis reverses the motion of the drums (0') and (i), the drum (i) noW commencing to haul in while (0') is lowering, the weight being landed at the for the rate of raising or lowering consequent upo-n archange of hoisting blocks, on the principle before described. The shifting of the clutches and (L) effects this object. The hauling in may be effected Without any aid from the horse in most cases, als the descent of the weight causes the rotationof the hauling in drum to take up theslack and is also the power by which the'weight is drawn clear of the ships side. The clutch (f) must in this case be `put in the middle notch (g) for the disengagementof the horse upon the inclined roadway (o), and thus he may stand at rest at these periods. v The position of the hoisting drum on the outside of the frame is advantageous for the purpose of loading carts and drays from goods deposited upon wharves, as these are to be high enough to raise the weight and permit the cart to come under and have it lowered upon it. The swinging boom shown in the ligure is not required, as the operation is just as effective when the hoist block is permanently xed to the mast or derrick.

What I claim as of my invention and desire to secure by Letters Patent of the United States isy The arrangement of the shafts with their hoisting drums so combined by shifting clutches and gearing that the various operations for the'hoisting and lowering of goods into or from ships, warehouses, &c., may be eiiected by a horse or other power acting continually in one direction, substantially in the manner and for the purpose described herein. n

ABRAHAM JACKSON.

Witnesses SAMUEL JACKSON, I. P. PIRssoN. 

